If that happens, the world can always try to fork. Until then it seems kind of pointless to do so?

Try is the keyword here.

Hence why these efforts should not rely on US institutions good will in first place.

Can try to fork?, china , russia, and lots of smaller countrys are steadily moving away and as basic introperability standards for phone and internet will remain, they can do this, and pressure is also mounting to get a linux phone fully functional, that will alao happen. And in a world where Guggappl is providing genocide and abduction services, Billions would happily choose other alternatives.